Variation illumination dynamic scene three-dimensional capturing system

Abstract

The invention relates to an illumination changing dynamic scene three-dimensional acquisition system, belonging to the dynamic scene acquisition technical field in the computer graphics, wherein the system includes: an illumination unit consisting of a plurality of daylight lamps and LEDs, an acquisition unit consisting of N cameras, a control unit consisting of a computer, a SCM and a power supply, a machinery mount and an additional apparatus consisting of an acquisition card and a server, a screen and a lifting steel frame, a fixing device and connecting lines. The SCM circuit and the powersupply, the computer, the camera and the LED are connected; the screen and the lifting steel frame cover the circumference of the whole machinery mount; the acquisition card on the server is connected with the camera; the LED, the daylight lamp and the camera are fixed on the machinery mount. Through controlling the fast change of the LED illumination and the acquisition time interval of the different cameras, the system realizes the illumination changing asymchronous acquisition of a plurality of groups of multi-visual angle video flow, thereby completing the three-dimensional acquisition aiming at the dynamic scene when changing the illumination condition.

Description

technical field [0001] The invention belongs to the technical field of scene acquisition in computer graphics, in particular to a three-dimensional acquisition system for dynamic scenes under changing illumination conditions. Background technique [0002] For the collection of real scenes, many universities and scientific research institutions in the world have designed and implemented many systems: [0003] In 2000, Debevec of the University of California implemented a two-dimensional acquisition system for static faces under changing lighting conditions (Acquiring the Reflectance Field of a Human Face, 2000, Siggraph) - the subject was static when the system was implemented Change the direction and brightness of the light without moving. The camera collects the light and dark changes of each area of ​​the face from a single perspective. After analyzing the results, the face image under any lighting condition can be calculated. The application of this system is limited by ...

AI Technical Summary

Problems solved by technology

This system is a real "3D acquisition", but because it does not consider the impact of new ambient lighting on the model, it is difficult for the system to achieve very realistic composite effects

[0007] In summary, none of these systems can combine changing lighting, dynamic scenes and 3D acquisition

Since the objects in the static scene are still, the collected image or video stream has nothing to do with the collection time, but only with the lighting conditions, so that the collection of changing lighting can be realized; while the dynamic scene is fleeting and cannot be repeated, the collection time is related to the lighting conditions. The influence of conditions is entangled and cannot be separated-this is the crux of the difficulty in combining changing lighting and dynamic acquisition

Although Wenger's system combines changing lighting and dynamic acquisition, only one can be installed due to the high cost of installing multiple expensive high-speed cameras

In this way, large-scale acquisition of multi-view angles is not possible, so three-dimensional acquisition cannot be realized through geometric modeling

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